28313849 has 2 divisors, whose sum is σ = 28313850. Its totient is φ = 28313848.

The previous prime is 28313807. The next prime is 28313863. The reversal of 28313849 is 94831382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28302400 + 11449 = 5320^2 + 107^2 .

It is a cyclic number.

It is not a de Polignac number, because 28313849 - 2¹⁶ = 28248313 is a prime.

It is not a weakly prime, because it can be changed into another prime (28313869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14156924 + 14156925.

It is an arithmetic number, because the mean of its divisors is an integer number (14156925).

Almost surely, 2^28313849 is an apocalyptic number.

It is an amenable number.

28313849 is a deficient number, since it is larger than the sum of its proper divisors (1).

28313849 is an equidigital number, since it uses as much as digits as its factorization.

28313849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 38.

The square root of 28313849 is about 5321.0759250362. The cubic root of 28313849 is about 304.7892443499.

The spelling of 28313849 in words is "twenty-eight million, three hundred thirteen thousand, eight hundred forty-nine".